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shooting at an angle

Discussion in 'Anything Airgun Related' started by AirArms456, Feb 5, 2014.

  1. AirArms456

    AirArms456 Junior Member

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    When shooting up into a tree, at various species of birds such as crows, magpies and wood pigeons, should I take any aiming precautions (hold over or or hold under? ) I have never quite understood shooting up at an increased angle as some people have stated that I should just stay at my zero and other have just simply confused me, so an explanation would be great!

    Thanks again everyone! My in experience is clearly shown with these many questions,but hopefully I will get there

    Isaac
     
  2. keithy

    keithy Keyboard Hero

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    As far as i am aware when shooting Up your pellet will hit lower, so use hold over. when shooting down your pellet will hit high so use hold under. The amount to use depends on the angle you are shooting. If i am wrong i am sure somebody will correct me on this.:rolleyes:
     
  3. AirArms456

    AirArms456 Junior Member

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    Tbh I think you are right! These are the instructions that quite a few people have given me, so unless anyone corrects you with a decent explanation I will take your word for it

    Cheer

    Isaac
     
  4. Meteor62

    Meteor62 Major Poster

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    It's supposed to hit high whether shooting up or down but for me I don't see this theory working out I just aim on. Have tried shooting countless leaves and the pellet goes smack on where I'm aiming. Try it yourself you may get different results although you will have a bit of a wait for some leaves to arrive.
     
  5. essex sniper

    essex sniper Banned

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    Iv always been told when shooting high aim low but depends on calibre angle distance etc your best bet is to practice shooting high and see how your rifle performs atb
     
  6. Honest Bob

    Honest Bob Big Poster

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    I second that. Bob
     
  7. splat

    splat Donator

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    way I read it is, you to the tree base and up to the branch form a triangle. gravity pulls pellet down along distance from you to tree base by the same amount wether you aim up/down or level.
    problem occurs with the fact that the angled slope from you to branch is further than to tree base....hence you aim for longer range than gravity is acting on. HTH

    example. if tree base is 20yds and tree branch is 30 yds...your shooting 30yds but only getting 20yds worth of pellet drop.
     
    Last edited: Feb 5, 2014
  8. terry1001

    terry1001 Major Poster

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    Splat has got the answer here, your pellet drop and therefore your ain points are going to be for the horizantal distance to the target NOT the actual direct distance along the slope. The aim point you should use will depend upon your setup, calibre/muzzle velocity/scope height/pellet etc.
    As the angle gets larger the effect increases to the point that if you were to shoot exactly vertically the pellet would, ignoring wind, travel straight up and not in the parabolic curve you get when shooting normally.
    If you want to see the effects without leaving your armchair then Chairgun Pro does have the option to input slope angles and calculate the trajectory.
     
  9. simonc_here

    simonc_here Engaging Member

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    I think of it this way:
    There is a squirrel at the base of a tree 30 yards away and your zero is 30 yards so you aim and hit on the cross hairs.
    If a bird was sitting at the top of this (very high 40 yard tall tree) and you would still need to aim directly on and would hit on the cross hairs.

    The confusion comes when you take a range finder and measured the direct distance between you and the bird it would be 50 yards. You then use your 50 yard shooting mark and the pellet whizzes over the birds head.
     
  10. AirArms456

    AirArms456 Junior Member

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    right ok I think I get you, I have chairgun pro and I am still currently working on setting it up, at the minute when i have been testing it, it hasn't been correct,this is obviously down to my own error, it is very hard as I haven't got a chronograph, so my power isn't always correct, I put it through a chrone about two weeks ago and it is putting out 10.8 ftlbs, but then my probe o ring snapped, I have replaced it now but should my power still be the same? I am using a Sr6 reticle at the minute which when figured out should be awesome but at the minute it is quite tricky.

    thanks

    isaac
     
  11. terry1001

    terry1001 Major Poster

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    If you put in all the correct data into Chairgun Pro it will give you good answers but even with assumed velocity you can get a good idea of what happens as you change various things.
    If, for example, you enter an energy figure of 11 ftlbs for your rifle it will fill in the velocity for you - just type the 11.0 in the energy box and hit 'enter'. Now you can change pellets, scope magnification, scope height etc (one at a time!) and see what difference that makes to the trajectory. You can look at the results in a graph or table format, whichever is most convenient.
    You can also change your zero distance and see what effect that has on your holdover aim points.
    Doing this will help to give you a better understanding of what happens when you change some of the settings in real life. You can also change the muzzle energy figure, say between 8 and 15 ftlbs, to see what differences you get in trajectory and down range retained energy.
     
  12. AirArms456

    AirArms456 Junior Member

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    Right ok no worries, I will just have to keep practicing!
     
  13. firebucket1415

    firebucket1415 Engaging Member

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    si pittaway gives a good explanation of this on you tube
     
  14. firebucket1415

    firebucket1415 Engaging Member

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    https://www.youtube.com/watch?v=nCJad1t3_CI&feature=youtube_gdata_player

    try the above link, you might have to copy and paste it, I can't seem to post active links from my tablet
    cheers
     
  15. AirArms456

    AirArms456 Junior Member

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    yeh I have already watched it! I think I have watched every Si pittaway video going, he explains things really well and he's a cracking shot!
     
  16. Jackroadkill

    Jackroadkill Donator

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    When shooting at an angle, aim low.
     
  17. landymick

    landymick Big Poster

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    Steep angles require aiming low but only slightly say about 3-5mm because its so slight you can usually just aim as your normal trajectory i.e. dead on for your given range.
     
  18. Accuspell

    Accuspell Pro Poster

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    If shooting live quarry in a tree, or deer on the hill, or chamois in the mountains.....you need to HIT LOW because your exit will be high. If you hit the same spot as for a level shot, the exit will be high and will, in the case of deer/chamois, mean you crease the animal and shatter the spine, rather than taking the heart and lungs. For pigeons, if you use the corner of the wing as your aim point for a heart lung shot, and aim as for level, then the pellet will miss the vitals because it is travelling upwards and will go over the top of the organs.

    To give yourself a mental picture to work with, imagine your pellet is an arrow and trace the line through the bird to hit the vitals, where the arrow needs to go in to pass through the vitals is your aiming point.
     
  19. Grumpyoldman

    Grumpyoldman Very Active

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    What Simon Said , however Grumps is a simple creature . if im shooting up im normally roost shooting woodies .I settle into my hide early and fire off a couple off magazines into safe backstops and aim / set scope accordingly :up: Worked for nearly 30 years , So il stick with it . Grumps is a low tech man in a high tech world :cool:
     
  20. landymick

    landymick Big Poster

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    I think your quite right when concerned with quarry & fac cals which have a flatter trajectory,my set up with duplex ret requires aim point low about quarter of an inch.
     

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